Description

Base class for all constitutive models of sections of Tapered Timoshenko beams.

This tapered section consists of two objects of ChBeamSectionTimoshenkoAdvancedGeneric. To be used with ChElementBeamTaperedTimoshenko.

#include <ChBeamSectionTaperedTimoshenko.h>

Inheritance diagram for chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGeneric:

Public Member Functions

void SetLength (double mv)
 Set the length of beam element with two sections.
 
double GetLength () const
 Get the length of beam element with two sections.
 
void SetLumpedMassMatrixType (bool mv)
 Set the type of mass matrix: More...
 
bool GetLumpedMassMatrixType () const
 Get the type of mass matrix: More...
 
void SetSectionA (std::shared_ptr< ChBeamSectionTimoshenkoAdvancedGeneric > my_material)
 Set the section & material of beam element at end A.
 
void SetSectionB (std::shared_ptr< ChBeamSectionTimoshenkoAdvancedGeneric > my_material)
 Set the section & material of beam element at end B.
 
std::shared_ptr< ChBeamSectionTimoshenkoAdvancedGenericGetSectionA ()
 Get the section & material of the element at end A.
 
std::shared_ptr< ChBeamSectionTimoshenkoAdvancedGenericGetSectionB ()
 Get the section & material of the element at end B.
 
virtual void ComputeInertiaMatrix (ChMatrixDynamic<> &M)
 Compute the 12x12 sectional inertia matrix, as in {x_momentum,w_momentum}=[Mm]{xvel,wvel} The matrix is computed in the material reference (i.e. More...
 
virtual void ComputeInertiaDampingMatrix (ChMatrixNM< double, 12, 12 > &Ri, const ChVector3d &mW_A, const ChVector3d &mW_B)
 Compute the 12x12 local inertial-damping (gyroscopic damping) matrix. More...
 
virtual void ComputeInertiaStiffnessMatrix (ChMatrixNM< double, 12, 12 > &Ki, const ChVector3d &mWvel_A, const ChVector3d &mWacc_A, const ChVector3d &mXacc_A, const ChVector3d &mWvel_B, const ChVector3d &mWacc_B, const ChVector3d &mXacc_B)
 Compute the 12x12 local inertial-stiffness matrix. More...
 
virtual DampingCoefficients GetRayleighDamping () const
 Get the average damping parameters of this tapered cross-section.
 
virtual void ComputeAverageSectionParameters ()
 Compute the average section parameters: mass, inertia and rigidity, etc.
 
virtual std::shared_ptr< AverageSectionParametersGetAverageSectionParameters () const
 Get the average sectional parameters(mass, inertia and rigidity, etc.) of this tapered cross-section.
 

Public Attributes

bool compute_inertia_damping_matrix = true
 Flag that turns on/off the computation of the [Ri] 'gyroscopic' inertial damping matrix. More...
 
bool compute_inertia_stiffness_matrix = true
 Flag that turns on/off the computation of the [Ki] inertial stiffness matrix. More...
 
bool compute_Ri_Ki_by_num_diff = false
 Flag for computing the Ri and Ki matrices via numerical differentiation even if an analytical expression is provided. More...
 
bool compute_ave_sec_par = false
 A lock to avoid computing avg_sec_par several times, initialized as false by default. More...
 

Protected Member Functions

virtual void ComputeLumpedInertiaMatrix (ChMatrixNM< double, 12, 12 > &M)
 Compute the 12x12 sectional inertia matrix in lumped format, as in {x_momentum,w_momentum}=[Mm]{xvel,wvel} The matrix is computed in the material reference (i.e. More...
 
virtual void ComputeSimpleConsistentInertiaMatrix (ChMatrixNM< double, 12, 12 > &M)
 
virtual void ComputeConsistentInertiaMatrix (ChMatrixNM< double, 12, 12 > &M)
 A very generic implementation for consistent mass matrix, considering mass center offset and axis orientation. More...
 

Protected Attributes

double length
 The length of beam element with two sections.
 
std::shared_ptr< ChBeamSectionTimoshenkoAdvancedGenericsectionA
 The section & material of beam element at end A.
 
std::shared_ptr< ChBeamSectionTimoshenkoAdvancedGenericsectionB
 The section & material of beam element at end B.
 
bool use_lumped_mass_matrix
 The type of mass matrix: More...
 
std::shared_ptr< AverageSectionParametersavg_sec_par
 

Member Function Documentation

◆ ComputeConsistentInertiaMatrix()

void chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGeneric::ComputeConsistentInertiaMatrix ( ChMatrixNM< double, 12, 12 > &  M)
protectedvirtual

A very generic implementation for consistent mass matrix, considering mass center offset and axis orientation.

The transformation of mass center offset and mass principal axis orientation is hard-coded.

Parameters
M12x12 sectional mass matrix values here

◆ ComputeInertiaDampingMatrix()

void chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGeneric::ComputeInertiaDampingMatrix ( ChMatrixNM< double, 12, 12 > &  Ri,
const ChVector3d mW_A,
const ChVector3d mW_B 
)
virtual

Compute the 12x12 local inertial-damping (gyroscopic damping) matrix.

The lumped format is used, need to multiple 0.5 * length to obtain the final inertial-damping matrix

Parameters
Ri12x12 sectional inertial-damping matrix values here
mW_Acurrent angular velocity of section of node A, in material frame
mW_Bcurrent angular velocity of section of node B, in material frame

◆ ComputeInertiaMatrix()

void chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGeneric::ComputeInertiaMatrix ( ChMatrixDynamic<> &  M)
virtual

Compute the 12x12 sectional inertia matrix, as in {x_momentum,w_momentum}=[Mm]{xvel,wvel} The matrix is computed in the material reference (i.e.

it is the sectional mass matrix)

Parameters
M12x12 sectional mass matrix values here

Reimplemented in chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGenericFPM.

◆ ComputeInertiaStiffnessMatrix()

void chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGeneric::ComputeInertiaStiffnessMatrix ( ChMatrixNM< double, 12, 12 > &  Ki,
const ChVector3d mWvel_A,
const ChVector3d mWacc_A,
const ChVector3d mXacc_A,
const ChVector3d mWvel_B,
const ChVector3d mWacc_B,
const ChVector3d mXacc_B 
)
virtual

Compute the 12x12 local inertial-stiffness matrix.

The lumped format is used, need to multiple 0.5 * length to obtain the final inertial-stiffness matrix

Parameters
Ki12x12 sectional inertial-stiffness matrix values here
mWvel_Acurrent angular velocity of section of node A, in material frame
mWacc_Acurrent angular acceleration of section of node A, in material frame
mXacc_Acurrent acceleration of section of node A, in material frame)
mWvel_Bcurrent angular velocity of section of node B, in material frame
mWacc_Bcurrent angular acceleration of section of node B, in material frame
mXacc_Bcurrent acceleration of section of node B, in material frame

◆ ComputeLumpedInertiaMatrix()

void chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGeneric::ComputeLumpedInertiaMatrix ( ChMatrixNM< double, 12, 12 > &  M)
protectedvirtual

Compute the 12x12 sectional inertia matrix in lumped format, as in {x_momentum,w_momentum}=[Mm]{xvel,wvel} The matrix is computed in the material reference (i.e.

it is the sectional mass matrix)

Parameters
M12x12 sectional mass matrix values here

◆ ComputeSimpleConsistentInertiaMatrix()

void chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGeneric::ComputeSimpleConsistentInertiaMatrix ( ChMatrixNM< double, 12, 12 > &  M)
protectedvirtual
Parameters
M12x12 sectional mass matrix values here

◆ GetLumpedMassMatrixType()

bool chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGeneric::GetLumpedMassMatrixType ( ) const
inline

Get the type of mass matrix:

  • true: lumped mass matrix.
  • false: consistent mass matrix.

◆ SetLumpedMassMatrixType()

void chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGeneric::SetLumpedMassMatrixType ( bool  mv)
inline

Set the type of mass matrix:

  • true: lumped mass matrix, which is default.
  • false: consistent mass matrix.

Member Data Documentation

◆ compute_ave_sec_par

bool chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGeneric::compute_ave_sec_par = false

A lock to avoid computing avg_sec_par several times, initialized as false by default.

If one wants to recalculate the avg_sec_par again, set this variable to 'false' and run ComputeAverageSectionParameters() again.

◆ compute_inertia_damping_matrix

bool chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGeneric::compute_inertia_damping_matrix = true

Flag that turns on/off the computation of the [Ri] 'gyroscopic' inertial damping matrix.

If false, Ri=0. Can be used for cpu speedup, profiling, tests. Default: true.

◆ compute_inertia_stiffness_matrix

bool chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGeneric::compute_inertia_stiffness_matrix = true

Flag that turns on/off the computation of the [Ki] inertial stiffness matrix.

If false, Ki=0. Can be used for cpu speedup, profiling, tests. Default: true.

◆ compute_Ri_Ki_by_num_diff

bool chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGeneric::compute_Ri_Ki_by_num_diff = false

Flag for computing the Ri and Ki matrices via numerical differentiation even if an analytical expression is provided.

Children calsses must take care of this. Default: false.

◆ use_lumped_mass_matrix

bool chrono::fea::ChBeamSectionTaperedTimoshenkoAdvancedGeneric::use_lumped_mass_matrix
protected

The type of mass matrix:

  • true: lumped mass matrix, which is default.
  • false: consistent mass matrix.

The documentation for this class was generated from the following files:
  • /builds/uwsbel/chrono/src/chrono/fea/ChBeamSectionTaperedTimoshenko.h
  • /builds/uwsbel/chrono/src/chrono/fea/ChBeamSectionTaperedTimoshenko.cpp